Does anyone remember any countries holding select committees to decide whether or not people should be allowed to use the internet? Whether or to export and import goods to and from each other? Whether or not to recognise (heterosexual, at least) marriages within each other's boundaries? Maybe I missed something, but I don't recall these or other such arguments.

That's because the internet and international trade were agreed to be mutually beneficial to the global community and economy, as well as those of individual countries. There are exceptions of course, such as the TPPA, but these exceptional debates are usually driven by protesters, not by governments and industries (although, Trump's dismissal of the TPPA highlights the fragility of this kind of generalisation, but please bear with me).